bought a lumia 1520 three days ago and charged it for first time probably around 12 hours when used it the second day morning heavily usage (i've some 30 active clients whom would chat me through VIBER, WECHAT and WHATSAPPA) as well as emails so i'd be using the phone from 9 am to almost 9 pm , before the update for the first day the phone battery drained 90% by 6 pm but when i updated yesterday it lasted till 10 pm around 20+ % still available and only a single charge in the morning... I LOVE my lumia 1520 massive battery!!! and the updated just improved it really.

bought a lumia 1520 three days ago and charged it for first time probably around 12 hours when used it the second day morning heavily usage (i've some 30 active clients whom would chat me through VIBER, WECHAT and WHATSAPPA) as well as emails so i'd be using the phone from 9 am to almost 9 pm , before the update for the first day the phone battery drained 90% by 6 pm but when i updated yesterday it lasted till 10 pm around 20+ % still available and only a single charge in the morning... I LOVE my lumia 1520 massive battery!!! and the updated just improved it really.

Bharath, 15 May 2014I live in India and yet to get update for my Nokia Lumia 820 windows 8.1 update. Kindly help i... moreI am in Saudi Arabia. It's best to wait for official firmware for ours Lumia 820.It's now being tested and issues are being fixed.Hope it will be certainly available by June 24 or so and all update done via wifi but keep updating your system apps manually as they are releasing some updates from time to time now a days in prep for WP8.1. Hope after that APPS/OS performance will be comparable to Android performance/features wise.

Anonymous, 15 May 2014I beg to differ! Every time I have updated WP, the battery life has gone worse. Only hard rese... moreDid you install the update when your battery is full? It takes couple days for the new OS to settle and get better battery.

I Live in Romania; the update brings a few refreshments over the apps that I have already installed, but nothing sensational. The battery life was good even since the update. I never thought to say that, but I just love windows mobile.